JP2001278452A - Air floating type receiver hopper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver hopper device lightening the whole weight and reducing the cost by using a thin air film. SOLUTION: A multi-move shoot 11 is so arranged as covering the top of the hopper body 2 and positioning its circumferential edge on a traveling board 4. The thin air film is formed between the multi-move shoot 11 and the traveling board 4 so as to movably float the multi-move shoot 11 relative to the traveling board 4. The multi-move shoot 11 is provided with skirt members 16 in the left/right both sides and rubber curtain members in the front/rear edges respectively, and a large capacity of air is fed in the skirt members 16 and inflated at a low pressure. At the same time, a part of the air is made to leak therefrom, the air is leaked from the skirt members 16 into a space surrounded with the skirt members 16 and the rubber curtain members so as to form a thin air film between the skirt members 16 and the traveling boards 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving a bulk cargo discharged by a ship-side unloader from a cargo hold of a ship berthing on a quay, and dropping the bulk cargo on a conveyor for transporting the bulk cargo to a predetermined position. The present invention relates to an air-floating receiving hopper device.

[0002]

2. Description of the Related Art Conventionally, bulk cargo such as coal and ore unloaded by a ship-side unloader from a cargo hold of a ship berthing on a quay is stored nearby by a conveyor such as a belt conveyor installed on the quay. It is known to transport to In this way, when carrying bulk cargo by the unloader on the ship side and the conveyor on the quay, in order to receive the bulk cargo from the unloader on the ship side and drop it on the conveyor, upstream of the conveyor in the cargo transport direction. Usually, a receiving hopper device is provided.

[0003] Such a receiving hopper device is provided on a quay, for example, as described in JP-A-10-212033, for the purpose of suppressing the diffusion of fine particles of bulk cargo into the atmosphere. A hopper main body installed to be located directly above the belt conveyor, a pool arranged to surround an upper edge of the hopper main body in a circumferential direction and storing liquid, and mounted on a tip of an unloader on a ship side; A cover for guiding the bulk cargo downward from the leading end portion of the unloader, a loading cylinder extending from the cover to the inside of the hopper body to guide the bulk cargo, and a rim covering the hopper body from above and having a peripheral portion stored in the pool. And a hopper covering member attached to the lower end of the charging cylinder so as to be immersed in the liquid.

[0004]

However, such an apparatus has the following problems because it has a pool for storing a liquid such as water. (1) In addition to the very large weight of the pool itself, when the liquid is filled, the pool becomes heavier (1).
(8 tons), and the position of the center of gravity is high, so that the stability is poor. (2) Since the weight of the pool is supported, the material cost of the rigid leg, the swing leg, and the truss frame is increased, which causes a cost increase. (3) Since the liquid is used, a so-called sloshing (undulating) phenomenon cannot be avoided, and if the liquid is frozen in winter, it cannot be used. (4) When bulk cargo, which is a cargo, is mixed into the pool, it takes time to clean. (5) Since the liquid is used, various troubles such as corrosion of the pool, replenishment of the liquid into the pool, inflow of rainwater, decay of the liquid in the pool, and mixing of seawater into the liquid in the pool occur. Cheap. (6) When the float moves in the pool, the resistance is small if the movement is slow, but the resistance is large if the movement is sudden and the movement is not smooth. (7) If the impact from the unloader, the cover, and the charging cylinder side is large, it may collide with the bottom of the tank.

SUMMARY OF THE INVENTION An object of the present invention is to provide a receiving hopper device which can reduce the total weight and reduce the cost by utilizing a thin air film.

[0006]

According to the present invention, there is provided an air-floating receiving hopper device for transferring a bulk cargo, which is unloaded by a ship-side unloader, from a cargo hold of a ship berthing to a quay, to a tip portion of the unloader. An air-floating receiving hopper device that receives through a mounted telescopic chute and drops onto a conveyor that conveys the bulk cargo to a predetermined position, and a hopper body provided to be located directly above the conveyor, A traveling plate disposed in the vicinity of an upper opening of the hopper main body, and the bulk cargo covering the upper part of the hopper main body and disposed on the traveling plate and received at a lower end of the telescopic chute through the telescopic chute. Hopper covering portion detachably connected so as to guide the hopper into the hopper body When the generating a thin air film between the hopper cover member and the running plate, but with an air floating means for movably flying the hopper cover member relative to said track plate.

With this configuration, the hopper covering member is movably levitated by the air levitation means with the thin air film on the traveling plate. In such a floating state, the coefficient of friction with the traveling plate is greatly reduced, and the horizontal direction is lower than in the case of using a liquid as in the technique described in JP-A-10-212033 described above. The force required to move the wing is much smaller. Further, since there is no need to provide a pool having a very large weight for storing the liquid, the total weight is greatly reduced, the support structure is simplified, and the cost is reduced.

Further, since no liquid is used, the so-called sloshing phenomenon does not occur, and it is not necessary to consider the freezing in winter, as well as the corrosion of the pool, the replenishment of the liquid in the pool, the rainwater in the pool. Various troubles such as inflow, spoilage of the liquid in the pool, and mixing of seawater into the liquid in the pool do not occur, which is advantageous in maintenance and inspection.

In addition, the thin air film formed between the hopper covering member and the traveling plate reduces the frictional resistance between the hopper covering member and the traveling plate, and moves the hopper covering member with a light force. In addition to being able to exert a damper function, it is possible to absorb and reduce the impact received from the unloader and the telescopic chute.

In this case, the air levitation means includes a bag-shaped skirt member provided annularly on both right and left sides of the hopper covering member, and supplies a large volume of air at a low pressure into the skirt member to inflate the hopper member. And an air supply means for partially leaking and forming a thin air film between the skirt member and the traveling plate.

With this configuration, the air supplied from the air supply means causes the skirt member to expand, and a part of the leaking air causes a low-pressure, large-volume air flow between the skirt member and the traveling plate. An air film due to the flow is formed, and the hopper covering member is raised. That is, the skirt member is inflated into a predetermined shape by the air supply means, and a part of the air supplied at that time leaks outside through the space between the skirt member and the traveling plate, so that the hopper covering member floats. An air film is formed.

[0012] Due to the flow of the air forming the air film, even if dust or powdery particles of bulk cargo fall on the traveling board, even if rainwater or snow is accumulated, they are blown off and move. There is no hindrance. Since this air flow (air film) also functions as a sealing portion, the sealing performance between the inside and the outside is ensured, and the generation of dust to the outside is reduced.

Preferably, the hopper covering member has a plurality of auxiliary wheels, and the auxiliary wheels are arranged near the skirt member.

With this configuration, even when the hopper covering member does not sufficiently float on the air, the movement is assisted by the auxiliary wheels, and the movement of the hopper covering member is realized.

The air levitation means is an air film generation means including a plurality of air film generation members, wherein each of the air film generation members is provided below a peripheral portion of the hopper covering member; A diaphragm provided on the base member and a small volume of air are supplied to the diaphragm at a high pressure to expand and partly leak, thereby forming a thin air film between the diaphragm and the traveling plate.

[0016] Even in this case, as in the case of the air levitation means described above, the hopper covering member allows the high-pressure, small-capacity thin air film (flow of air) to exist on the traveling plate by the air film generation means. Floating, the coefficient of friction with the running plate is greatly reduced, the force to move in the horizontal direction is much smaller, the overall weight is lighter, the support structure can be simplified, Cost reduction is realized.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are a front view, a plan view and a side view of an air-floating receiving hopper device according to the present invention.

In FIG. 1 to FIG. 3, a receiving hopper device 1 movably provided on a quay includes two hopper bodies 2 arranged in parallel. Two conveyors 3 are arranged in parallel. The receiving hopper device 1 receives a bulk cargo discharged by a ship-side unloader (not shown) from a cargo hold of a ship berthing on a quay, and places the bulk hopper on a conveyor 3 that conveys the bulk cargo to a predetermined position. It is configured to drop. Although not specifically shown, a ceramic liner is provided below the hopper body 2. Further, windshields 4 are provided on the left and right sides of both conveyors 3.

The receiving hopper device 1 is provided with a base 6 for supporting the substrate 5 in a horizontal state, and a traveling plate 7 having a smooth upper surface and a vertical wall portion 7a (see FIG. 5) on the substrate 5 on the outer side.
Are provided on the upper portions of the two hopper bodies 2 so as to be located on both sides in the arrangement direction thereof. Although not specifically shown, the substrate 5 is formed with an opening facing the upper opening of the hopper body 2 so as to be located between the traveling plates 7.

The base 6 has a truss structure, one side of which is supported by rigid legs 8A and the other side of which is supported by rocking legs 8B.
Wheels 9 are provided below the rigid legs 8A and the swing legs 8B,
The wheels 9 are configured to roll on the running rails 10, and are configured so as to be entirely movable along the running rails 10.

On the traveling plate 7, the hopper body 2
A multi-move chute 11 (hopper covering member) having a hollow structure that covers the upper side of the multi-move chute 11 is provided. 11a is formed. The distal end portion (lower end portion) of the telescopic chute 12 at the tip of the unloader on the ship side is removably inserted into the opening 11a, and through the opening 11a,
Bulk cargo is dropped onto one of the selected hopper bodies 2.

The telescopic chute 12 is inserted into an opening 11a of the multi-move chute 11, and is connected to the multi-move chute 11 by connecting means (not shown).
Are integrally connected. The telescopic shoot 1
Although not specifically illustrated, 2 includes an inner cylinder and a bellows-shaped outer cylinder that surrounds the inner cylinder in a circumferential direction, as is well known, and the inner cylinder has an opening cross section that faces downward. Are gradually reduced, arranged vertically in series so that adjacent ones loosely fit with each other, suspended in a multi-stage manner by a chain or the like, and the lower end of the inner cylinder body located at the lowermost end The upper end of the inner cylinder main body positioned at the uppermost end is rotatably connected to the unloader side.

The multi-move chute 11 is shown in FIGS.
As shown in detail in FIG. 6, a plan view is formed in a rectangular shape,
The lower surface 11b is a substantially horizontal surface, and the upper surface 11c is an inclined surface whose height decreases as it approaches the periphery. On the periphery of the lower surface 11b of the multi-move chute 11, a frame 14 having a closed sectional structure is formed over the entire periphery.

As shown in FIGS. 7 and 8, a support frame 15 which is longer than the frame 14 in the running direction and is opened downward is formed on both left and right sides of the frame 14.
A bag-shaped skirt member 16 positioned on the traveling plate 7 for traveling the multi-move chute 11 is provided in an annular shape around the periphery of the skirt member 16. At the front and rear edges of the frame 14, rubber elastic members (not shown) having flexibility and having lower edges in contact with the upper surfaces of the substrate 5 and the traveling plate 7 are provided.
Further, a plurality of auxiliary wheels 18 are provided in the support frame 15, and the auxiliary wheels 18 are arranged near the skirt member 16 to assist the movement of the multi-move chute 11. In FIGS. 1 and 4, the skirt member 16 is shown only on one side, and the other side is not shown.

As shown in detail in FIGS. 7 and 8, the skirt member 16 protrudes laterally from the support frame 15 and extends in a horizontal direction and a vertical direction. Attached to. That is, the skirt member 1 is located near the base end of the first support bracket 21.
One side edge portion 6 is fixedly attached using fasteners 23 such as bolts and nuts and a holding plate 36. On the other hand, the second support brackets 22 are disposed at regular intervals in the circumferential direction, and are supported by the second support bracket 22.
A vertical wall member 24 is supported on the periphery of the skirt member 16 and a fastener 26 such as a bolt or a nut is attached to a horizontal wall member 25 projecting outward in the horizontal direction from the vertical wall member 24.
And a fixing plate 29. Thereby, a cylindrical first space portion S1 is formed over the entire outer periphery of the support frame 15, and is located on the traveling plate 7. In addition, the first support bracket 21 includes:
One end of the air pipe 27 is connected, and the first space S1 formed by being surrounded by the skirt member 16 is formed.
The air is supplied to. Further, a plurality of openings (not shown) are formed in a portion located inside the skirt member 16 so that a part of the air in the first space S1 is transferred to the traveling plate 7, the support frame 15, and the skirt. It leaks into the second space S2 surrounded by the member 16.

The supply of the air is performed by connecting the other end of the air pipe 27 to an air pipe 28 provided in the frame 14. The supply of air to the air pipe 28 in the frame 14 is performed by an air external pipe 30.
4 (see FIG. 4) through an air inlet 14a (see FIG. 6) formed in the side surface of the frame 14. Air piping 2
8 and air external piping 30
A duct hose made of vinyl chloride is used, which has a reinforcing cord, is strong in elongation, has excellent bending durability, and has excellent resistance to chemicals such as acids and alkalis, so that it can follow the movement of products. H).

Therefore, the floating blower 31 on the substrate 5 is driven to supply air to the first space S1 formed by the skirt member 16 through the external air pipe 30, the air pipe 28, the air pipe 27 and the like. Then, the inside of the skirt member 16 is filled with air and expanded, and a part of the air is leaked into the second space portion S2 through a plurality of openings (not shown) provided inside the skirt member 16. A multi-move chute 11 is floated on the traveling plate 7 so that a hovercraft (air from a floating fan blows out from the bottom of the hull,
An amphibious high-speed ship) type air levitation means is constructed in which the hull floats by the wind pressure and travels.

Next, the operation of the receiving hopper device 3 will be described.

When unloading bulk cargo by a ship-side unloader from a cargo hold of a ship berthing on the quay, the tip of the ship-side unloader is stopped at an appropriate height above the hopper body 2 and telescopic. Shoot 12
Of the multi-move chute 11
And the distal end of the telescopic chute 12 and the multi-move chute 11 are connected by connecting means (not shown) so as to move integrally.

When the connecting operation is completed, the unloader 3 and the dust collector 32 (see FIG. 2) are operated to start the unloading operation of the bulk cargo. In FIG. 2, 33 denotes a dust collector operation panel, 34 denotes a dust collecting fan, and 35 denotes a dust collector compressor.

The bulk cargo delivered by the unloader is dropped onto the conveyor 3 from the tip of the unloader via the telescopic chute 12, the multi-move chute 11, and the hopper body 2. At this time, the fine particles of the bulk cargo are captured by the dust collector 32.

At this time, a telescopic chute 12 for guiding the bulk cargo to the hopper body 2 is connected to the multi-move chute 11, and the multi-move chute 11
A skirt member 16 is attached to the multi-move chute 11 so that the multi-move chute 11 floats on the traveling plate 4 located near both sides of the upper opening of the hopper body 2 via an air film caused by the flow of air. Therefore, even if the telescopic chute 12 expands and contracts or bends (see the chain lines in FIGS. 1, 3, 4 and 6) following the fluctuation of the ship or the draft during the unloading operation, the multi-move chute 11
Moves in the horizontal direction according to the above-mentioned expansion and contraction or bending, so that the relative displacement between the tip portion (telescopic chute 12) of the unloader and the multi-move chute 11 due to fluctuation of the ship or draft is flexibly permitted. . Further, the impact force from the chute 12 side when the multi-move chute 11 and the telescopic chute 12 are connected is also reduced by the air film formed between the traveling plate 4 and the skirt member 16. This effect is further enhanced because the skirt member 16 itself is inflated with air.

Further, since air blows out from the inner peripheral side of the skirt member 16 of the multi-move chute 11 to which the telescopic chute 12 for guiding the bulk cargo to the hopper body 2 is connected, the bulk cargo from the telescopic chute 12 to the hopper body 2 is blown. In this transfer path, the fine particles of the bulk cargo do not flow out to the outside and are not diffused into the atmosphere, and the fine particles of the bulk can be efficiently captured even if the dust collector 32 has a small capacity.

Therefore, the receiving hopper device 1 prevents the fine particles of the bulk cargo from diffusing into the atmosphere between the tip portion of the telescopic chute 12 and the hopper body 2 when unloading the bulk cargo from the ship. Can be realized.

The air levitation means uses a relatively low-pressure, large-volume air (0.07 kgf / cm ² or less, 10 liters / sec) to support the multi-move chute 11 which is heavy. Although a thin air film is formed between the running plate 4 and the running plate 4, the structure is not limited to the above-described structure.
Various changes are also possible.

For example, a plurality of air film generating members 43 having a structure shown in FIGS. 9 and 10, that is, a disk-shaped base plate 41 made of an aluminum alloy and having an annular diaphragm 42 as a pad of special urethane attached thereto.
It is also possible to use the air film generation device 44 provided with
This device 44 also has F = P &A;
Although this air film generation device 44 has a high pressure of 4 kgf / cm ² , its capacity is only 1/1000, and it has a relatively high pressure and a small volume of air based on (force = pressure × area). The pressure zone is a space below the base plate 41 surrounded by the diaphragm 42.
Each air film generation member 43 is connected to an air hose 46 via an air flow rate adjustment valve 45 for adjusting the amount of air supplied to the air film generation member 43, and the air hose 46 is connected to an air source via a three-way valve 47. (Not shown). An upper convex portion 41a that supports the multi-move chute 11 is provided at the center of the upper surface of the base plate 41, and a lower convex portion 41b that comes into contact with the traveling plate 4 in a normal state is provided at the center of the lower surface. When this air film generation device 44 is used, the air film generation members 43 are arranged at an appropriate position below the multi-move chute 11 in a required number according to the weight of the multi-move chute 11. There is a need.

According to the air film generation member 43, FIG.
When the pressurized air is supplied, the diaphragm 42 in close contact with the traveling plate 4 swells, the contact between the lower convex portion 41b and the traveling plate 4 is released, and then as the internal pressure increases, the diaphragm 42 is increased. Further expands, and continues to push up the multi-move chute 11. And pressure P & time
s; the point at which the effective push-up area A becomes equal to the downward force F by the multi-move chute 11 or the like (F = P ×
A) is reached. At this point, some of the air
2 leaks into the internal space (pressure zone) surrounded by the diaphragm 42 through the opening 42a, and increases the pressure in the internal space. Through the air and their contact is interrupted by the flow of air. In this state, air leaks over the entire circumference, and an air film, which is an air flow, is generated between the diaphragm 42 and the traveling plate 4.

Once the air film is formed by the flow of the air, the frictional resistance is extremely small and is 1/1000.
And the multi-move chute 11 can be moved with a small force. In addition, since a relatively high pressure and a small volume of air are used, there is little scattering of the powdery particles of the bulk cargo around the air flow.

[0040]

The present invention is embodied as described above, and has the following effects.

The air-floating receiving hopper device according to the present invention covers the upper part of the hopper body and is placed on the traveling plate when unloading bulk cargo from the cargo hold of the ship berthing on the quay by the ship-side unloader. Since the hopper covering member, which is disposed so as to be positioned and is detachably coupled to the lower end of the telescopic chute, is floated by the air levitation means with a thin air film on the traveling plate, The coefficient of friction with the running plate is greatly reduced, the force to move in the horizontal direction is much smaller, the overall weight is lighter, the support structure is simplified, and costs can be reduced. . In addition, since the air film has a damper effect, it is possible to absorb and reduce the impact received from the unloader side.

In this case, the air levitation means includes a bag-shaped skirt member provided annularly on a peripheral portion of the hopper covering member, a supply of air into the skirt member, and a connection between the skirt member and the traveling plate. If an air supply means for supplying a large volume of air at a low pressure is provided therebetween, an air film is formed by the flow of a large volume of air at a low pressure, and the hopper covering member can easily float.

The hopper covering member has a plurality of auxiliary wheels, and if the auxiliary wheels are located inside the skirt member,
Even when the hopper covering member does not float by the auxiliary wheels, the traveling can be assisted and the movement can be realized.

Further, the air levitation means includes a base member provided below the peripheral portion of the hopper covering member, a diaphragm provided on the base member, and a high-pressure, small-volume air supply to the diaphragm. In the case of the air levitation means described above, if it is constituted by an air film generation means having a plurality of air film generation members that expand and partially leak and form a thin air film between the diaphragm and the traveling plate. Similarly, the hopper covering member floats on the traveling plate with a high-pressure, small-capacity thin air film, so that the coefficient of friction with the traveling plate can be greatly reduced. Reduce weight and stow down.

[Brief description of the drawings]

FIG. 1 is a side view of an air-floating receiving hopper device according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is an enlarged side view of the main part.

FIG. 5 is an enlarged plan view of the main part.

FIG. 6 is an enlarged front view of the main part.

FIG. 7 is an enlarged view showing a portion VII of FIG. 4 in an enlarged manner.

FIG. 8 is a plan view near the end of the air levitation means according to the present invention.

FIG. 9 is a side view of an air film generation device according to another embodiment of the air levitation means.

FIG. 10 is a plan view of an air film generation member that is a component of the air film generation device.

FIG. 11 is an explanatory view of the operation principle of the air film generation member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying means 2 Hopper main body 3 Receiving hopper device 7 Running plate 11 Multi-move chute (hopper covering member) 11a Opening 16 Skirt member 41 Base plate 42 Diaphragm 43 Air film generation member 44 Air film generation device

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ao Kawasaki 3-1-1 Higashi Kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo F-term in KP Corporation (reference) 3F011 BA01 BC06 3F075 AA07 BA01 BB01 CA06 DA17 DA27

Claims (4)

[Claims] 1. A cargo hold of a ship berthing on a quay,
Bulk cargo unloaded by the ship's unloader,
An air-floating receiving hopper device that receives through a telescopic chute mounted on a tip portion of the unloader and drops the conveyor onto the conveyor that conveys the bulk cargo to a predetermined position, provided to be located directly above the conveyor. A hopper main body, a traveling plate provided near an upper opening of the hopper main body, and a telescopic chute disposed at a lower end of the telescopic chute disposed above the hopper main body and disposed on the traveling plate. A hopper covering member detachably coupled so as to guide the bulk cargo received through a chute into the hopper body; and forming a thin air film between the hopper covering member and a traveling plate; Air levitation means for movably levitating with respect to the traveling plate. Air floating receiving hopper device. 2. The air levitation means includes a bag-shaped skirt member provided annularly on both right and left sides of the hopper covering member, and supplies a large volume of air at a low pressure into the skirt member to inflate the hopper member. 2. The air levitation receiving hopper device according to claim 1, further comprising air supply means for partially leaking and forming a thin air film between the skirt member and the traveling plate. 3. The air-floating receiving hopper device according to claim 2, wherein the hopper covering member has a plurality of auxiliary wheels, and the auxiliary wheels are arranged near the skirt member. 4. The air levitation means is an air film generation means having a plurality of air film generation members, and each of the air film generation members is a base member provided below a peripheral portion of the hopper covering member. And a diaphragm provided on the base member, and a small volume air is supplied to the diaphragm at high pressure to expand and partially leak, forming a thin air film between the diaphragm and the traveling plate. The air levitation receiving hopper device according to claim 1.